[#0] WARNING:InputArguments -- The parameter 'sigma' with range [-inf, inf] of the RooGaussian 'sig' exceeds the safe range of (0, inf). Advise to limit its range.
  1) 0x7ffcc69da498 RooRealVar:: x = 5  L(0 - 10)  "x"
  1) 0x7ffcc69d6638 RooRealVar::       a0 = 0.5  L(0 - 1)  "a0"
  2) 0x7ffcc69d6a20 RooRealVar::       a1 = 0.2  L(0 - 1)  "a1"
  3) 0x7ffcc69d6e08 RooRealVar::    alpha = -1 C  L(-INF - +INF)  "alpha"
  4) 0x7ffcc69d71f0 RooRealVar:: bkg1frac = 0.2  L(0 - 1)  "fraction of component 1 in background"
  5) 0x7ffcc69d75d8 RooRealVar::  bkgfrac = 0.5  L(0 - 1)  "fraction of background"
  6) 0x7ffcc69d8a20 RooRealVar::     mean = 5 C  L(-INF - +INF)  "mean of gaussians"
  7) 0x7ffcc69d6250 RooRealVar::    sigma = 0.5 C  L(-INF - +INF)  "width of gaussians"
RooArgSet::parameters = (a0,a1,alpha,bkg1frac,bkgfrac,mean,sigma)
  1) 0x7ffcc69d9820 RooAddPdf:: model[ bkgfrac * bkg + [%] * sig ] = 0.582695/1  "g1+g2+a"
  2) 0x7ffcc69d8300 RooAddPdf::   bkg[ bkg1frac * bkg1 + [%] * bkg2 ] = 0.16539/1  "Signal"
  3) 0x7ffcc69d5828 RooChebychev::  bkg1[ x=x coefList=(a0,a1) ] = 0.8  "Background 1"
  4) 0x7ffcc69d5d58 RooExponential::  bkg2[ x=x c=alpha ] = 0.00673795  "Background 2"
  5) 0x7ffcc69d7da8 RooGaussian::   sig[ x=x mean=mean sigma=sigma ] = 1  "Signal component 1"
[#0] WARNING:InputArguments -- The parameter 'sigma2' with range [-inf, inf] of the RooGaussian 'sig2' exceeds the safe range of (0, inf). Advise to limit its range.
[#1] INFO:ObjectHandling -- RooCustomizer::build(model): tree node sig will be replaced by sigsum
[#1] INFO:ObjectHandling -- RooCustomizer::build(model) Branch node RooAddPdf::model cloned: depends on a replaced parameter
[#1] INFO:ObjectHandling -- RooCustomizer::build(model) Branch node sig is already replaced
0x3e53ad0 RooAddPdf::model_cust = 0.582695/1 [Auto,Clean] 
  0x7ffcc69d8300/V- RooAddPdf::bkg = 0.16539/1 [Auto,Clean] 
    0x7ffcc69d5828/V- RooChebychev::bkg1 = 0.8 [Auto,Dirty] 
      0x7ffcc69da498/V- RooRealVar::x = 5
      0x7ffcc69d6638/V- RooRealVar::a0 = 0.5
      0x7ffcc69d6a20/V- RooRealVar::a1 = 0.2
    0x7ffcc69d71f0/V- RooRealVar::bkg1frac = 0.2
    0x7ffcc69d5d58/V- RooExponential::bkg2 = 0.00673795 [Auto,Dirty] 
      0x7ffcc69da498/V- RooRealVar::x = 5
      0x7ffcc69d6e08/V- RooRealVar::alpha = -1
  0x7ffcc69d75d8/V- RooRealVar::bkgfrac = 0.5
  0x7ffcc69da880/V- RooAddPdf::sigsum = 1/1 [Auto,Clean] 
    0x7ffcc69d7da8/V- RooGaussian::sig = 1 [Auto,Dirty] 
      0x7ffcc69da498/V- RooRealVar::x = 5
      0x7ffcc69d8a20/V- RooRealVar::mean = 5
      0x7ffcc69d6250/V- RooRealVar::sigma = 0.5
    0x7ffcc69d91f0/V- RooRealVar::sig1frac = 0.8
    0x7ffcc69d9f40/V- RooGaussian::sig2 = 1 [Auto,Dirty] 
      0x7ffcc69da498/V- RooRealVar::x = 5
      0x7ffcc69d8a20/V- RooRealVar::mean = 5
      0x7ffcc69d8e08/V- RooRealVar::sigma2 = 1